VM/guest unable to resize screen

[kalpana]

Hi all,

VirtualBox

Host - Ubuntu 22.04 desktop

VMs
Ubuntu 22.04 desktop
Win 10 Home
Win 11

Drive: PCIe MVNe 3.0 SSD

Just discovered in recent 2~3 days that all VMs are unable to increase screen size, dragging with mouse. It finally turns to a black screen then collapses (aborted)

They were working without problem before. Please advise where I have to check. Thanks

Regards